How to show a projectile hitting a wall in app designer

i currently have code for a projectile and for an obstacle to appear. How would i show the projectile hitting the obstacle and then falling down at the place of hitting it? this is also one of two conditions so how should i go about separating these? im thinking to use a for loop where i use the values for obstacle height and distance to, to determine whether the obstacle condition is running?

Currently this the code for plotting:

        Ox = app.DistancetothewallobstaclefromlaunchEditField.Value
        Oy = app.ObstacleheightEditField.Value
        Ot = (app.ObstaclethicknessSlider.Value)/100 
        
        rectangle(app.Graph,'Position',[Ox 0 Ot Oy],'FaceColor',[0.6353 0.0784 0.1843]) %obstacle plot
                  
       hold(app.Graph,'on')
       comet(app.Graph,x,y,0.1) %projectile plot